MTB Orienteering - None from the U.S. at the WOC?

No cyclists from the U.S. are at the Mountain Bike Orienteering World Champs.* When I look at mtb-O maps or read reports from races, I always wonder why the sport hasn't gotten any traction in the U.S. I guess we just don't have the organizers. I don't think USOF has done much to push the sport.

I'm fairly sure the U.S. has more Trail O (aka Pre-O) competitors than MTB-orienteers in any given year.